After being framed by his girlfriend Zhou Ji, algorithm engineer Chen Mo became a debt repayment tool in the underground arena. In the slippery arena on a rainy night, he took advantage of the loopholes in the rules of the temporary contract to kill Li Bao, the champion trained by the chaebol, but was targeted by Su Tang, the organizer behind the scenes. When Han Qiu, the chaebol's legal advisor, sets a more deadly contract trap, Chen Mo must save the situation on the spot in a life-and-death battle. Zhou Ji's betrayal and Lao Wei's secret assistance allow the truth about betrayal and redemption to emerge among the bystanders.
